package com.wy.system.config;


import com.wy.system.custom.CustomMd5Password;
import com.wy.system.filter.TokenAuthenticationFilter;
import com.wy.system.filter.TokenLoginFilter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;


@Configuration
@EnableWebSecurity //@EnableWebSecurity是开启SpringSecurity的默认行为
@EnableGlobalMethodSecurity(prePostEnabled = true)//开启注解功能，默认禁用注解
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

  @Autowired
  private UserDetailsService userDetailsService;

  @Autowired
  private CustomMd5Password customMd5Password;

  @Autowired
  private RedisTemplate redisTemplate;

  @Bean
  @Override
  protected AuthenticationManager authenticationManager() throws Exception {
    return super.authenticationManager();
  }

  @Override
  protected void configure(HttpSecurity http) throws Exception {
    // 这是配置的关键，决定哪些接口开启防护，哪些接口绕过防护
    http
        //关闭csrf
        .csrf().disable()
        // 开启跨域以便前端调用接口
        .cors().and()
        .authorizeRequests()
        // 指定某些接口不需要通过验证即可访问。登陆接口肯定是不需要认证的
        //.antMatchers("/admin/system/index/login").permitAll()
        // 这里意思是其它所有接口需要认证才能访问
        .anyRequest().authenticated()
        .and()
        //TokenAuthenticationFilter放到UsernamePasswordAuthenticationFilter的前面，这样做就是为了除了登录的时候去查询数据库外，其他时候都用token进行认证。
        .addFilterBefore(new TokenAuthenticationFilter(redisTemplate), UsernamePasswordAuthenticationFilter.class)
        .addFilter(new TokenLoginFilter(authenticationManager(), redisTemplate));

    //禁用session
    http.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
  }

  @Override
  protected void configure(AuthenticationManagerBuilder auth) throws Exception {
    // 指定UserDetailService和加密器
    auth.userDetailsService(userDetailsService).passwordEncoder(customMd5Password);
  }

  /**
   * 配置哪些请求不拦截
   * 排除swagger相关请求
   * @param web
   * @throws Exception
   */
  @Override
  public void configure(WebSecurity web) throws Exception {
    web.ignoring().antMatchers("/favicon.ico","/swagger-resources/**", "/webjars/**", "/v2/**", "/swagger-ui.html/**", "/doc.html");
  }
}
